Sagnac loop in ring resonators for tunable optical filters
General filter architecture using co-and counterpropagation signals are studied. A specific configuration based on a Sagnac loop within a ring resonator is analyzed. Novel tuning, apart from conventional tuning,is achieved by changing the coupling ratio of a coupler through the adjustment of the equ...
| Autores Principales: | Vargas, Salvador, Vázquez, Carmen, Sánchez Pena, José Manuel |
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| Formato: | Artículo |
| Idioma: | Inglés |
| Publicado: |
2018
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| Materias: | |
| Acceso en línea: |
https://www.osapublishing.org/jlt/abstract.cfm?uri=jlt-23-8-2555 http://ridda2.utp.ac.pa/handle/123456789/4897 http://ridda2.utp.ac.pa/handle/123456789/4897 |
| Sumario: |
General filter architecture using co-and counterpropagation signals are studied. A specific configuration based on a Sagnac loop within a ring resonator is analyzed. Novel tuning, apart from conventional tuning,is achieved by changing the coupling ratio of a coupler through the adjustment of the equivalent loop length. Full equations describing the filter behavior in passive and active configurations, and simple closed-form formulas to compute the tuning, tolerance, and full-width at half-maximum are reported. The performance of these devices is discussed for their application as selective or channel-dropping ultra-narrow-band filters. The effect of losses and their dispersion properties are also discussed. These devices can be conveniently implemented, using silicon-or InP-integrated optic technology, for they have high free spectral ranges. |
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